<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <title></title>
</head>
<style type="text/css">
    body,
    html {
        margin: 0;
        width: 100%;
        overflow: hidden;
        background: #000000;
    }
    
    canvas {
        position: absolute;
        width: 100%;
    }
    
    .control {
        position: absolute;
    }
    
    .control input {
        border: 0;
        margin: 0;
        padding: 15px;
        outline: none;
        text-align: center;
    }
    
    .control button {
        border: 0;
        margin: 0;
        padding: 15px;
        outline: none;
        background: #333;
        color: #fff;
    }
    
    .control button:focus,
    .control button:hover {
        background: #222
    }
	.abc{
		text-decoration: none;
		text-align: right;
		color: white;
	}
</style>
<script src="js/jquery.min.js" type="text/javascript" charset="utf-8"></script>

<body>
	
    <div class="control" style="position:absolute">
    </div>
	<a href="index2.html" class="abc" target="_blank"><div>下一页</div></a>
	<script type="text/javascript">
	    var can = document.createElement("canvas");
	    document.body.appendChild(can);
	    var ctx = can.getContext('2d');
	    var Fireworks = function() {
	        var self = this;
	        var rand = function(rMi, rMa) {
	            return ~~((Math.random() * (rMa - rMi + 1)) + rMi);
	        }
	        var hitTest = function(x1, y1, w1, h1, x2, y2, w2, h2) {
	            return !(x1 + w1 < x2 || x2 + w2 < x1 || y1 + h1 < y2 || y2 + h2 < y1);
	        };
	        self.init = function() {
	            self.canvas = document.createElement('canvas');
	            self.canvas.width = self.cw = $(window).innerWidth();
	            self.canvas.height = self.ch = $(window).innerHeight();
	            self.particles = [];
	            self.partCount = 150;
	            self.fireworks = [];
	            self.mx = self.cw / 2;
	            self.my = self.ch / 2;
	            self.currentHue = 30;
	            self.partSpeed = 5;
	            self.partSpeedVariance = 10;
	            self.partWind = 50;
	            self.partFriction = 5;
	            self.partGravity = 1;
	            self.hueMin = 0;
	            self.hueMax = 360;
	            self.fworkSpeed = 4;
	            self.fworkAccel = 10;
	            self.hueVariance = 30;
	            self.flickerDensity = 25;
	            self.showShockwave = true;
	            self.showTarget = false;
	            self.clearAlpha = 25;
	            $(document.body).append(self.canvas);
	            self.ctx = self.canvas.getContext('2d');
	            self.ctx.lineCap = 'round';
	            self.ctx.lineJoin = 'round';
	            self.lineWidth = 1;
	            self.bindEvents();
	            self.canvasLoop();
	            self.canvas.onselectstart = function() {
	                return false;
	            };
	        };
	        self.createFireworks = function(startX, startY, targetX, targetY) {
	            var newFirework = {
	                x: startX,
	                y: startY,
	                startX: startX,
	                startY: startY,
	                hitX: false,
	                hitY: false,
	                coordLast: [{
	                    x: startX,
	                    y: startY
	                }, {
	                    x: startX,
	                    y: startY
	                }, {
	                    x: startX,
	                    y: startY
	                }],
	                targetX: targetX,
	                targetY: targetY,
	                speed: self.fworkSpeed,
	                angle: Math.atan2(targetY - startY, targetX - startX),
	                shockwaveAngle: Math.atan2(targetY - startY, targetX - startX) + (90 * (Math.PI / 180)),
	                acceleration: self.fworkAccel / 100,
	                hue: self.currentHue,
	                brightness: rand(50, 80),
	                alpha: rand(50, 100) / 100,
	                lineWidth: self.lineWidth
	            };
	            self.fireworks.push(newFirework);
	        };
	        self.canvasLoop = function() {
	            window.requestAnimationFrame(self.canvasLoop, self.canvas);
	            self.ctx.globalCompositeOperation = 'destination-out';
	            self.ctx.fillStyle = 'rgba(0,0,0,' + self.clearAlpha / 100 + ')';
	            self.ctx.fillRect(0, 0, self.cw, self.ch);
	            self.updateFireworks();
	            self.updateParticles();
	            self.drawFireworks();
	            self.drawParticles();
	        };
	        self.drawParticles = function() {
	            var i = self.particles.length;
	            while (i--) {
	                var p = self.particles[i];
	                var coordRand = (rand(1, 3) - 1);
	                self.ctx.beginPath();
	                self.ctx.moveTo(Math.round(p.coordLast[coordRand].x), Math.round(p.coordLast[coordRand].y));
	                self.ctx.lineTo(Math.round(p.x), Math.round(p.y));
	                self.ctx.closePath();
	                self.ctx.strokeStyle = 'hsla(' + p.hue + ', 100%, ' + p.brightness + '%, ' + p.alpha + ')';
	                self.ctx.stroke();
	                if (self.flickerDensity > 0) {
	                    var inverseDensity = 50 - self.flickerDensity;
	                    if (rand(0, inverseDensity) === inverseDensity) {
	                        self.ctx.beginPath();
	                        self.ctx.arc(Math.round(p.x), Math.round(p.y), rand(p.lineWidth, p.lineWidth + 3) / 2, 0, Math.PI * 2, false)
	                        self.ctx.closePath();
	                        var randAlpha = rand(50, 100) / 100;
	                        self.ctx.fillStyle = 'hsla(' + p.hue + ', 100%, ' + p.brightness + '%, ' + randAlpha + ')';
	                        self.ctx.fill();
	                    }
	                }
	            };
	        };
	        self.drawFireworks = function() {
	            var i = self.fireworks.length;
	            self.ctx.globalCompositeOperation = 'lighter';
	            while (i--) {
	                var f = self.fireworks[i];
	                self.ctx.lineWidth = f.lineWidth;
	                var coordRand = (rand(1, 3) - 1);
	                self.ctx.beginPath();
	                self.ctx.moveTo(Math.round(f.coordLast[coordRand].x), Math.round(f.coordLast[coordRand].y));
	                self.ctx.lineTo(Math.round(f.x), Math.round(f.y));
	                self.ctx.closePath();
	                self.ctx.strokeStyle = 'hsla(' + f.hue + ', 100%, ' + f.brightness + '%, ' + f.alpha + ')';
	                self.ctx.stroke();
	                if (self.showTarget) {
	                    self.ctx.save();
	                    self.ctx.beginPath();
	                    self.ctx.arc(Math.round(f.targetX), Math.round(f.targetY), rand(1, 8), 0, Math.PI * 2, false)
	                    self.ctx.closePath();
	                    self.ctx.lineWidth = 1;
	                    self.ctx.stroke();
	                    self.ctx.restore();
	                }
	                if (self.showShockwave) {
	                    self.ctx.save();
	                    self.ctx.translate(Math.round(f.x), Math.round(f.y));
	                    self.ctx.rotate(f.shockwaveAngle);
	                    self.ctx.beginPath();
	                    self.ctx.arc(0, 0, 1 * (f.speed / 5), 0, Math.PI, true);
	                    self.ctx.strokeStyle = 'hsla(' + f.hue + ', 100%, ' + f.brightness + '%, ' + rand(25, 60) / 100 + ')';
	                    self.ctx.lineWidth = f.lineWidth;
	                    self.ctx.stroke();
	                    self.ctx.restore();
	                }
	            };
	        };
	        self.updateFireworks = function() {
	            var i = self.fireworks.length;
	            while (i--) {
	                var f = self.fireworks[i];
	                self.ctx.lineWidth = f.lineWidth;
	                vx = Math.cos(f.angle) * f.speed,
	                    vy = Math.sin(f.angle) * f.speed;
	                f.speed *= 1 + f.acceleration;
	                f.coordLast[2].x = f.coordLast[1].x;
	                f.coordLast[2].y = f.coordLast[1].y;
	                f.coordLast[1].x = f.coordLast[0].x;
	                f.coordLast[1].y = f.coordLast[0].y;
	                f.coordLast[0].x = f.x;
	                f.coordLast[0].y = f.y;
	                if (f.startX >= f.targetX) {
	                    if (f.x + vx <= f.targetX) {
	                        f.x = f.targetX;
	                        f.hitX = true;
	                    } else {
	                        f.x += vx;
	                    }
	                } else {
	                    if (f.x + vx >= f.targetX) {
	                        f.x = f.targetX;
	                        f.hitX = true;
	                    } else {
	                        f.x += vx;
	                    }
	                }
	                if (f.startY >= f.targetY) {
	                    if (f.y + vy <= f.targetY) {
	                        f.y = f.targetY;
	                        f.hitY = true;
	                    } else {
	                        f.y += vy;
	                    }
	                } else {
	                    if (f.y + vy >= f.targetY) {
	                        f.y = f.targetY;
	                        f.hitY = true;
	                    } else {
	                        f.y += vy;
	                    }
	                }
	                if (f.hitX && f.hitY) {
	                    self.createParticles(f.targetX, f.targetY, f.hue);
	                    self.fireworks.splice(i, 1);
	                }
	            };
	        };
	        self.createParticles = function(x, y, hue) {
	            var countdown = self.partCount;
	            while (countdown--) {
	                var newParticle = {
	                    x: x,
	                    y: y,
	                    coordLast: [{
	                        x: x,
	                        y: y
	                    }, {
	                        x: x,
	                        y: y
	                    }, {
	                        x: x,
	                        y: y
	                    }],
	                    angle: rand(0, 360),
	                    speed: rand(((self.partSpeed - self.partSpeedVariance) <= 0) ? 1 : self.partSpeed - self.partSpeedVariance, (self.partSpeed + self.partSpeedVariance)),
	                    friction: 1 - self.partFriction / 100,
	                    gravity: self.partGravity / 2,
	                    hue: rand(hue - self.hueVariance, hue + self.hueVariance),
	                    brightness: rand(50, 80),
	                    alpha: rand(40, 100) / 100,
	                    decay: rand(10, 50) / 1000,
	                    wind: (rand(0, self.partWind) - (self.partWind / 2)) / 25,
	                    lineWidth: self.lineWidth
	                };
	                self.particles.push(newParticle);
	            }
	        };
	        self.updateParticles = function() {
	            var i = self.particles.length;
	            while (i--) {
	                var p = self.particles[i];
	                var radians = p.angle * Math.PI / 180;
	                var vx = Math.cos(radians) * p.speed;
	                var vy = Math.sin(radians) * p.speed;
	                p.speed *= p.friction;
	                p.coordLast[2].x = p.coordLast[1].x;
	                p.coordLast[2].y = p.coordLast[1].y;
	                p.coordLast[1].x = p.coordLast[0].x;
	                p.coordLast[1].y = p.coordLast[0].y;
	                p.coordLast[0].x = p.x;
	                p.coordLast[0].y = p.y;
	                p.x += vx;
	                p.y += vy;
	                p.y += p.gravity;
	                p.angle += p.wind;
	                p.alpha -= p.decay;
	                if (!hitTest(0, 0, self.cw, self.ch, p.x - p.radius, p.y - p.radius, p.radius * 2, p.radius * 2) || p.alpha < .05) {
	                    self.particles.splice(i, 1);
	                }
	            };
	        };
	        self.bindEvents = function() {
	            $(self.canvas).on('mousedown', function(e) {
	                self.mx = e.pageX - self.canvas.offsetLeft;
	                self.my = e.pageY - self.canvas.offsetTop;
	                self.currentHue = rand(self.hueMin, self.hueMax);
	                self.createFireworks(self.cw / 2, self.ch, self.mx, self.my);
	            });
	            $(self.canvas).on('mouseup', function(e) {
	                $(self.canvas).off('mousemove.fireworks');
	            });
	        };
	        self.init();
	    }
	
	    function resize() {
	        can.width = window.innerWidth;
	        can.height = window.innerHeight;
	    }
	    const max_radius = 3;
	    const min_radius = 1;
	    //粒子大小
	    const drag = 50;
	    window.onresize = function() {
	        resize();
	    };
	
	    function cfill() {
	        ctx.fillStyle = "#000";
	        ctx.fillRect(0, 0, can.width, can.height);
	        ctx.fill();
	    }
	    resize();
	    cfill();
	    class Particle {
	        constructor(pos, target, vel, color, radius) {
	            this.pos = pos;
	            this.target = target;
	            this.vel = vel;
	            this.color = color;
	            this.radius = radius;
	            this.direction = 0;
	        }
	        set(type, value) {
	            this[type] = value;
	        }
	
	        update() {
	            this.radius = 2;
	            this.vel.x = (this.pos.x - this.target.x) / drag;
	            this.vel.y = (this.pos.y - this.target.y) / drag;
	            this.pos.x -= this.vel.x;
	            this.pos.y -= this.vel.y;
	        }
	        draw() {
	            ctx.beginPath();
	            ctx.fillStyle = this.color;
	            ctx.arc(this.pos.x, this.pos.y, this.radius, 0, Math.PI * 2);
	            ctx.fill();
	        }
	    }
	    var particles = [];
	    var colors = ["#bf1337", "#f3f1f3", "#084c8d", "#f2d108", "#efd282"];
	    var bool = true;
	    var current = 0,
	        i;
	
	    function changeText(text) {
	        var current = 0,
	            temp, radius, color;
	        ctx.fillStyle = "#fff";
	        ctx.font = "160px 楷体";
	        ctx.fillText(text, can.width * 0.5 - ctx.measureText(text).width * 0.5, can.height * 0.5 + 60);
	        var data = ctx.getImageData(0, 0, can.width, can.height).data;
	        cfill();
	        for (i = 0; i < data.length; i += 12) {
	            if (data[i] !== 0 && (Math.random() * 10) >= 8.8) {
	                radius = max_radius - Math.random() * min_radius;
	                temp = {
	                    x: (i / 4) % can.width,
	                    y: ((i / 4) / can.width)
	                };
	                color = colors[0];
	                var p = new Particle(
	                    temp, {
	                        x: (i / 4) % can.width,
	                        y: ((i / 4) / can.width)
	                    }, {
	                        x: 0,
	                        y: 0
	                    },
	                    color,
	                    radius);
	                particles.push(p);
	                ++current;
	            }
	        }
	        particles.splice(current, particles.length - current);
	    }
	
	    function draw(obj) {
	        ctx.beginPath();
	        ctx.arc(obj.target.x, obj.target.y, obj.radius, 0, 2 * Math.PI);
	        ctx.fillStyle = obj.color;
	        ctx.fill();
	    }
	    changeText("  元旦快乐");
	    var t = 0;
	    var id;
	    var fworks = new Fireworks();
	
	    function init() {
	        id = window.requestAnimationFrame(init)
	        if (t >= particles.length - 1) {
	            window.cancelAnimationFrame(id)
	        }
	        draw(particles[t])
	        t++;
	        var rand = function(rMi, rMa) {
	            return ~~((Math.random() * (rMa - rMi + 1)) + rMi);
	        }
	        if (t % 5 == 0) {
	            fworks.currentHue = rand(0, 360);
	            fworks.createFireworks($(window).innerWidth() / 2, $(window).innerHeight(), particles[t].pos.x, particles[t].pos.y);
	        }
	    }
	    init();
		
	</script>
	
</body>



</html>